Added update install function

app/src/main/AndroidManifest.xml

@@ -4,6 +4,7 @@
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
 
     <application
             android:name="corewala.buran.Buran"

app/src/main/java/corewala/buran/io/update/BuranUpdates.kt

@@ -1,13 +1,26 @@
 package corewala.buran.io.update
 
-import java.net.URL
+import android.app.DownloadManager
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Context.DOWNLOAD_SERVICE
+import android.content.Intent
+import android.content.IntentFilter
+import android.net.Uri
+import android.os.Build
+import android.os.Environment
+import androidx.core.content.FileProvider
+import corewala.buran.BuildConfig
+import corewala.buran.R
+import java.io.File
 import java.net.HttpURLConnection
+import java.net.URL
 
 
 class BuranUpdates {
 
     fun getLatestVersion(): String {
-        var latestVersion = ""
+        var latestVersion = BuildConfig.VERSION_NAME
 
         val updateCheckThread = Thread {
             val url = "https://github.com/Corewala/Buran/releases/latest"
@@ -25,4 +38,54 @@ class BuranUpdates {
 
         return latestVersion
     }
+
+
+
+    fun installUpdate(context: Context, latestVersion: String) {
+        val updateUrl = "https://github.com/Corewala/Buran/releases/download/$latestVersion/Buran-$latestVersion.apk"
+        val updateFileName = "Buran.apk"
+        val updateDestination = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).path + "/$updateFileName"
+        val fileUri = Uri.parse("file://$updateDestination")
+        val packageFile = File(updateDestination)
+        if (packageFile.exists()){
+            packageFile.delete()
+        }
+
+        val request = DownloadManager.Request(Uri.parse(updateUrl))
+        request.setTitle(context.getString(R.string.app_name) )
+        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_HIDDEN)
+
+        request.setDestinationUri(fileUri)
+        request.setMimeType("application/vnd.android.package-archive")
+        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
+        val updateDownloadManager = context.getSystemService(DOWNLOAD_SERVICE) as DownloadManager
+        println("Downloading update")
+        updateDownloadManager.enqueue(request)
+
+        val contentUri = FileProvider.getUriForFile(
+            context,
+            BuildConfig.APPLICATION_ID + ".provider",
+            packageFile
+        )
+
+        val updateDownloadReceiver: BroadcastReceiver = object : BroadcastReceiver() {
+            override fun onReceive(context: Context, intent: Intent) {
+                val intent = Intent(Intent.ACTION_VIEW)
+
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
+                    intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
+                    intent.setDataAndType(contentUri, "application/vnd.android.package-archive")
+                } else {
+                    intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
+                    intent.setDataAndType(contentUri, "application/vnd.android.package-archive")
+                }
+
+                println("Installing update")
+                context.startActivity(intent)
+            }
+        }
+
+        context.registerReceiver(updateDownloadReceiver, IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE))
+        packageFile.delete()
+    }
 }